Package flumotion :: Package component :: Package converters :: Package overlay :: Module overlay
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Source Code for Module flumotion.component.converters.overlay.overlay

 1  # -*- Mode: Python -*- 
 2  # vi:si:et:sw=4:sts=4:ts=4 
 3  # 
 4  # Flumotion - a streaming media server 
 5  # Copyright (C) 2004,2005,2006,2007 Fluendo, S.L. (www.fluendo.com). 
 6  # All rights reserved. 
 7   
 8  # This file may be distributed and/or modified under the terms of 
 9  # the GNU General Public License version 2 as published by 
10  # the Free Software Foundation. 
11  # This file is distributed without any warranty; without even the implied 
12  # warranty of merchantability or fitness for a particular purpose. 
13  # See "LICENSE.GPL" in the source distribution for more information. 
14   
15  # Licensees having purchased or holding a valid Flumotion Advanced 
16  # Streaming Server license may use this file in accordance with the 
17  # Flumotion Advanced Streaming Server Commercial License Agreement. 
18  # See "LICENSE.Flumotion" in the source distribution for more information. 
19   
20  # Headers in this file shall remain intact. 
21   
22  import os 
23   
24  from twisted.internet import defer 
25   
26  from flumotion.common import log 
27   
28  from flumotion.component import feedcomponent 
29  from flumotion.component.converters.overlay import genimg 
30   
31  import tempfile 
32   
33 -class Overlay(feedcomponent.ParseLaunchComponent):
34 checkTimestamp = True 35 checkOffset = True 36 _filename = None 37
38 - def get_pipeline_string(self, properties):
39 # due to createComponent entry pointism, we have to import inside our 40 # function. PLEASE MAKE THE PAIN GO AWAY ? <- might not be 41 # necessary still 42 43 # we need an element that does RGBA -> AYUV so we can overlay png 44 # this got added to ffmpegcolorspace in 0.8.5 45 addalpha = 'ffmpegcolorspace' 46 47 source = self.config['source'][0] 48 eater = '@ eater:%s @' % source 49 50 # the order here is important; to have our eater be the reference 51 # stream for videomixer it needs to be specified last 52 pipeline = ( 53 'filesrc name=source blocksize=100000 ! pngdec ! alphacolor ! ' 54 'videomixer name=mix ! @ feeder:: @ ' 55 '%(eater)s ! %(addalpha)s ! mix.' % locals()) 56 57 return pipeline
58
59 - def configure_pipeline(self, pipeline, properties):
60 self.fixRenamedProperties(properties, [ 61 ('show_text', 'show-text'), 62 ('fluendo_logo', 'fluendo-logo'), 63 ('cc_logo', 'cc-logo'), 64 ('xiph_logo', 'xiph-logo') 65 ]) 66 67 # create temp file 68 (fd, self._filename) = tempfile.mkstemp('flumotion.png') 69 os.close(fd) 70 71 text = None 72 if properties.get('show-text', False): 73 text = properties.get('text', 'set the "text" property') 74 genimg.generate_overlay(self._filename, 75 text, 76 properties.get('fluendo-logo', False), 77 properties.get('cc-logo', False), 78 properties.get('xiph-logo', False), 79 properties['width'], 80 properties['height']) 81 82 source = self.get_element('source') 83 source.set_property('location', self._filename)
84
85 - def do_stop(self):
86 # clean up our temp file 87 if self._filename: 88 self.debug('Removing temporary overlay file %s' % self._filename) 89 os.unlink(self._filename) 90 self._filename = None 91 else: 92 self.debug("Temporary overlay already gone, " \ 93 "did we not start up correctly ?") 94 return feedcomponent.ParseLaunchComponent.do_stop(self)
95